The state of South Australia announced last week that it had powered up the world’s biggest battery ahead of schedule: a feat already being heralded as one of this century’s first great engineering marvels and a potential solution to the country’s energy woes.

The battery is the size of an American football field.

The 100 MW/129 MWh battery was installed in the rural town of Jamestown north of Adelaide and connected to a wind farm operated by French energy firm Neoen.

On Thursday, it supplied 70MW of stored energy on Thursday, November 30, according to the Australian Energy Market Operator (AEMO).

That energy is capable of powering more than 30,000 homes, and its rapid deployment reflects the union of a blackout-prone state and a flashy entrepreneur, Elon Musk, the founder of Tesla Motors, who pledged to complete its construction in 100 days or do it for free.

“This is history in the making,” said Jay Weatherill, the premier of South Australia.

In a statement, Tesla said the completed battery “shows that a sustainable, effective energy solution is possible”.

“Of course, the whole thing then exploded, and everyone’s piling on me, saying ‘Grab it!’” Weatherill said at a conference in Adelaide, the state’s capital, in September.

For Weatherill, the project has been a repudiation of a federal policy that de-emphasises renewable energy.

Functional, economical

For Musk, the battery has been a headline-grabbing venture that could prove that his radical vision of the world’s energy future is both functional and economical.

“This fits into his MO of doing these big, grandstanding things to get attention for the company and the technology that he’s building,” said Ashlee Vance, the author of a 2015 biography of Musk.

“Tesla’s at this really critical stage where they’re trying to be both a car company and an energy company at the same time.”

Australia is a fitting target for Musk. The country is the world’s largest exporter of coal.

By most measures, it is the sunniest continent on earth. It has abundant wind and hydroelectric power capabilities.

Paying more for power

And yet the cost of electricity in Australia increased 20 per cent from 2012 to 2016, and Australians this year paid between 50-100 per cent more for their power than Americans, according to experts.

Tesla switched on the world's biggest lithium ion battery on Friday, December 1, in time to feed Australia's shaky power grid for the first day of summer, meeting a promise by Elon Musk to build it in 100 days — or give it free. Tesla won a bid in July to build the 129-megawatt hour battery for South Australia, which expanded in wind power far quicker than the rest of the country, but has suffered a string of blackouts over the past 18 months. - Yahoo

South Australia has the highest electricity prices in the world.

This imbalance of supply and demand has resulted in regular blackouts and astronomical bills for the state’s 1.7 million residents.

The high-capacity Tesla battery does not create energy, it just stores it.

The state already invests in wind and solar energy.

The battery would give it a bank of saved energy, which could ease pressure during periods of high demand and help better manage the electrical grid.

40% from wind

“More than 40 per cent of South Australia’s electricity is coming from wind, which is good,” said Tony Wood, an energy director at the Grattan Institute, a think-tank.

“But the consideration of how to integrate it — and manage that intermittency — wasn’t so good.”

The day after Weatherill was roused from his couch in March, he and Musk spoke on the phone about the proposal.

The Australian, knowing the tech mogul’s ability to stir the news media, had one demand: If Tesla were to win the contract, Musk would appear in South Australia to announce it to the world.

“He usually doesn’t come for announcements of winning a tender,” Weatherill said, “but he said he’d come.”

Musk nearly broke his promise, after a rocket launch by his company SpaceX was delayed.

100-day countdown

But in September, Musk arrived in Adelaide to announce the $50 million deal and to start the 100-day countdown to the project’s completion.

“What this serves as is a great example to the rest of the world of what can be done,” Musk said at the time, adding that half the battery had already been finished.

In March, when Musk first presented his proposal, Prime Minister Malcolm Turnbull spoke with the entrepreneur and tweeted enthusiastically about its potential.

Months later, when Tesla and the French renewables company Neoen were awarded the contract, however, Turnbull’s Liberal Party government assailed the battery project and continued its attack on South Australia’s energy policy.

“30,000 South Australian households could not get through watching one episode of “Australia’s Ninja Warrior” with this big battery,” said Scott Morrison, the country’s treasurer.

Turnbull’s government has promoted fossil fuels over renewable energy to stimulate growth and prevent South Australia’s power shortages.

Capacity questioned

The government has questioned the battery’s capacity, implied the state has been hoodwinked by a clever salesman and suggested that Weatherill was looking for publicity before a 2018 election.

“The Tesla battery has been sold to the people of South Australia as an answer to their woes,” Josh Frydenberg, the energy minister, wrote in an email.

“But in reality, it is just a fraction of the storage and backup that South Australia needs.”

Franck Woitiez, the general manager of Neoen’s Australia division, which will operate the battery from its wind farm, said the Turnbull government was out of touch with the future of renewable energy.

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